Recent posts

#1

ESP32 / Re: ESP32-PoE

Last post by LubOlimex - January 26, 2026, 04:41:10 PM

It builds without issues here.

Using library Ethernet at version 3.3.5 in folder: C:\Users\olimex\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.5\libraries\Ethernet
Using library Network at version 3.3.5 in folder: C:\Users\olimex\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.5\libraries\Network
Using library SPI at version 3.3.5 in folder: C:\Users\olimex\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.5\libraries\SPI
"C:\\Users\\olimex\\AppData\\Local\\Arduino15\\packages\\esp32\\tools\\esp-x32\\2511/bin/xtensa-esp32-elf-size" -A "C:\\Users\\olimex\\AppData\\Local\\Temp\\arduino_build_53441/external-power-sense.ino.elf"
Sketch uses 506247 bytes (38%) of program storage space. Maximum is 1310720 bytes.
Global variables use 25864 bytes (7%) of dynamic memory, leaving 301816 bytes for local variables. Maximum is 327680 bytes.

Maybe use the 3.3.5 version of the ESP32 library like me or re-install it.

#2

ESP32 / Re: New ESP32-POE-ISO - was I ...

Last post by LubOlimex - January 26, 2026, 08:34:16 AM

Probably U7 died. Maybe try replacing U7 which is TPS62A02ADRLR(SOT-563-6) and see if it'd work. It is not the easiest soldering job but not the hardest either. Hopefully it is the only component that died.

#3

ARDUINO / Re: Shield LCD16x2 with Arduin...

Last post by Dan - January 25, 2026, 02:14:04 PM

I got it to work with Nano 33 BLE. By including this line: #include <avr/dtostrf.h>, in LCD16x2.cpp file.

#4

ESP32 / Re: New ESP32-POE-ISO - was I ...

Last post by chrismacp - January 23, 2026, 04:49:08 PM

Thanks for the response, happy to hear I don't have to send it back

For the 12v issue, I applied it to the 5v pin, no other power would have been applied from usb or ethernet.

#5

ESP32 / Re: New ESP32-POE-ISO - was I ...

Last post by LubOlimex - January 23, 2026, 03:26:37 PM

Where did you apply 12V to? Maybe it can be fixed by changing a component or two.

#6

ESP32 / Re: New ESP32-POE-ISO - was I ...

Last post by LubOlimex - January 23, 2026, 03:18:09 PM

No, you are good. This is a factory patch applied in hardware revision M1. It is mentioned in the hardware revision changes:

https://github.com/OLIMEX/ESP32-POE-ISO/blob/master/HARDWARE/Hardware-changes-log.txt

#7

ESP32 / New ESP32-POE-ISO - was I sold...

Last post by chrismacp - January 23, 2026, 12:36:28 PM

Hi,

I recently had to buy a new ESP32-POE-ISO as I mistakenly applied 12v to my previous one for a few seconds and it no longer functions (although LEDs do come on).

After unpacking the new unit I noticed it had an extra component ("570F KE") connecting capacitor C26+ to the black box component (DCDC1 I think). I couldn't find a match online to the extra component "570F KE".

I was wondering if this component was to be expected or if I should return this unit? I don't really want something that someone has modified.

Some images (don't seem to open using [img] tags)

https://drive.google.com/file/d/1ccucp0A1oC0FB8-1nU1VaNSfdpXIjaSX/view?usp=sharing

https://drive.google.com/file/d/1Ahccl6cMLyJu11ljA_Rqvy3IGnk5gCB4/view?usp=sharing

https://drive.google.com/file/d/1dgueAAM4adKMQBRIsOjPSFV30N7dl61-/view?usp=sharing


Note: I didn't purchase directly from Olimex, but another store, in Germany.

#8

ESP32 / Re: ESP32-PoE

Last post by Seawolf - January 23, 2026, 04:19:26 AM

I tried running the exact code from tomdom - December 10, 2024, 02:04:02 PM

But that came up with the following error:

 In function 'void setup()':
C:\Users\hefin\AppData\Local\Arduino15\packages\esp32\hardware\esp32\3.3.3\variants\esp32-poe/pins_arduino.h:7:23: error: invalid conversion from 'int' to 'eth_phy_type_t' [-fpermissive]

#9

ESP32 / Re: ESP32-POE-ISO-WROVER rev L...

Last post by LubOlimex - January 12, 2026, 09:44:44 AM

Try with this code (download the whole repo):

https://github.com/OLIMEX/MOD-LCD2.8RTP/tree/master/SOFTWARE/Arduino/graphicstest_olimex_NS2009

Make sure PSRAM is enabled in your board selection options (this is specific for WROVER boards).

#10

ESP32 / ESP32-POE-ISO-WROVER rev L + M...

Last post by daybreak - January 11, 2026, 10:46:11 PM

ESP32-POE-ISO-WROVER rev L + MOD-LCD2.8RTO rev D the Display only shows backlight LED. I could not activate the display with text. I have tried a lot of variants in the code. Are there any special things to make it work?

the uext gpio set up is:
| UEXT-Pin | Signal | ESP32-GPIO | Funktion |
|----------|--------|------------|----------|
| 1 | 3.3V | 3.3V | Stromversorgung |
| 2 | GND | GND | Masse |
| 7 | **MISO** | **GPIO19** | **D/C (als Output!)** |
| 8 | MOSI | GPIO23 | SPI MOSI |
| 9 | CLK | GPIO18 | SPI CLK |
| 10 | SSEL | GPIO5 | SPI CS |